Inventory Templete - Custom fonts does not work?

Inventory Templete - Custom fonts does not work?

Hello! I've created an email template and used font called "Montserrat". Im using this font on my website, as well as my offers etc. I managed to make it work in email templates but once started to make an inventory template for sending a quote there seems to be a problem. In theeditor text looks as should:
but once converted to PDF:


Is there anything I can do to show up properly? Or do I need to use only standard fonts for this one?

Thank you.